Upload your receipt for Wildcard by Marie Lu to participate in this bonus offering, while supplies last. Must be 18 years of age or older at the time of entry. Void where prohibited or restricted by law. No groups, club, or organizations may participate. Limited to one request per IP address. Incomplete forms will not be eligible. Multiple entries from the same email address will be automatically disqualified. US mailing address required. Please allow 5 weeks for Warcross swag pack to arrive by mail. Offer valid between August 14, 2018 and September 18, 2018.